[ICOM] That didn't take long - Re: Icom 706 Dead on Tx and Rx(Again)

[Phil Krichbaum]

Tim Moes at Midwest Technical Services in Watertown SD used to do the 
warranty for Burkhart Radio and has been able to service any Icom I've 
sent him, quick and reasonable. He has a web site. I know several other 
happy customers.
    Phil N0KE

Al Waschka wrote:
> The web site says they no longer support the 706.  I presume that means service as well.  I had read that the MI service center was good so I sent them an e-mail but so far no response.  I'll call WA on Monday.
>
> Thanks,
>
> Al
>
>
>
>
>
> ________________________________
>  From: Tim Duffy <k3lr at k3lr.com>
> To: 'ICOM Reflector' <icom at mailman.qth.net> 
> Sent: Saturday, August 3, 2013 11:32 PM
> Subject: Re: [ICOM] That didn't take long - Re: Icom 706 Dead on Tx and Rx(Again)
>  
>
> Send it to Icom service in Bellevue, WA ASAP and let them fix it. I think
> you will be happy.
>
> 73,
> Tim K3LR
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
> Behalf Of Al Waschka
> Sent: Saturday, August 03, 2013 9:27 PM
> To: ICOM Reflector
> Subject: [ICOM] That didn't take long - Re: Icom 706 Dead on Tx and
> Rx(Again)
>
> I made three contacts on 20 and it went dead again.  Something really
> strange here.  Going to have to get professional help, I guess.  Whatever it
> is, must be a bad joint somewhere as it works for a while and then quits. 
> Odd thing is, it doesn't get well when the radio cools off.  When it's bad,
> it's bad.  Only gets well when the boards are disturbed.
>
>
> ________________________________
> From: Al Waschka <awaschka at bellsouth.net>
> To: ICOM Reflector <icom at mailman.qth.net> 
> Sent: Saturday, August 3, 2013 6:59 PM
> Subject: Re: [ICOM] Icom 706 Dead on Tx and Rx (Again)
>
>
> I'm underwhelmed with the responses (0).  
>  
> For the record, a close inspection of the main board in the vicinity of the
> connector pins for the BPF board appeared to have some solder joints or
> splashes that, over time, may have bridged.  I cleaned up everything I saw
> and the radio got well (again).  Only time will tell if I fixed it or it
> healed itself, only to fail again later.
>  
> Al
>  
>
>
> ________________________________
> From: Al Waschka <awaschka at bellsouth.net>
> To: ICOM Reflector <icom at mailman.qth.net> 
> Sent: Thursday, August 1, 2013 6:55 PM
> Subject: [ICOM] Icom 706 Dead on Tx and Rx (Again)
>
>
> Seveal months ago I posted on here about a problem with my IC-706 (Mk I). 
> After finding and replacing a damaged cap, the radio got well and stayed
> well for several months, but the problem has now returned.  The replaced cap
> is fine.
>  
> Symptoms are no transmit output and severely degraded (40 dB) receiver
> operation on HF.  Based on output Rx noise, the attenuator and preamp appear
> to be working fine.  I can hear the noise at three distinct levels depending
> on whether the preamp or attenuator are selected.  On strong injected
> signals, the relative levels of the three options appear correct.  VHF works
> fine.
>  
> I have instrumented the radio with test points and traced signals through to
> the main board.  It appears that the filter unit is working normally. 
> Signals injected on all HF bands pass through the filter unit and appear
> unattenuated at the input to the main board.  After the receive signal is
> routed to the main board from the filter unit, it passes through a high pass
> filter consisting of C3, C5, C7 and L4, L5.  The output of this filter does
> not look right.  Either some of the diode switching is malfunctioning or
> components in the filter have changed values.  Instead of the 3.9 MHz signal
> I'm injecting, the filter is passing only high order harmonics, and those at
> attenuated levels.
>  
> Has anyone seen anything like this, and if so, was a cure discovered?  I'll
> continued to troubleshoot, but I thought I'd poll the group to see if there
> might be a shortcut.
>  
> Thanks,
>  
> Al K5TAN 
> ----
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> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
>